After nine months of repose, Taal reactivated on July 5, 1966 with another phreatomagmatic eruption from Mount Tabaro, followed by another similar eruption on August 16, 1967.
12.
The most recent period of activity lasted from 1965 to 1977, and was characterized by the interaction of magma with the lake water, which produced violent phreatic and phreatomagmatic eruptions.
13.
The morphology of ash particles from phreatomagmatic eruptions is controlled by stresses within the chilled magma which result in fragmentation of the glass to form small blocky or pyramidal glass ash particles.
14.
There is debate about the exact nature of phreatomagmatic eruptions, and some scientists believe that stress waves, widening cracks and increasing surface area that ultimetly lead to rapid cooling and explosive contraction-driven eruptions.
15.
It is believed that the products of phreatomagmatic eruptions are fine grained and poorly sorted where the magma / water ratio is high, but when there is a lower magma / water ratio the deposits may be coarser and better sorted.
16.
"' Cerro Overo "'is a maar lying at the foot of Chiliques volcano and close to Laguna Lej�a, in the Antofagasta Region of northern Chile It is the result of a phreatomagmatic eruption, its maximum diameter is and its depth is.
